公开(公告)号：US4970707A

公开(公告)日：1990-11-13

申请号：US239389

申请日：1988-09-01

申请人： Fumio Hara ,  Yoshito Tsunoda ,  Shigeru Nakamura ,  Yoshizumi Eto ,  Seiichi Mita ,  Morishi Izumita ,  Hiroyuki Tsuchinaga ,  Masuo Kasai

发明人： Fumio Hara ,  Yoshito Tsunoda ,  Shigeru Nakamura ,  Yoshizumi Eto ,  Seiichi Mita ,  Morishi Izumita ,  Hiroyuki Tsuchinaga ,  Masuo Kasai

IPC分类号： G11B7/003 ,  G11B7/09

CPC分类号： G11B7/09 ,  G11B7/0031 ,  G11B7/0925

摘要： An optical tape apparatus having improved focus and tracking control. An optical head records, reproduces, or rewrites data on an optical tape by helically scanning the tape with a laser beam. A guide plate is disposed between the optical head and the tape to prevent the beam from becoming unfocused due to fluctuation of the tape cuased by an air film between the optical head and the tape. The optical head contains a semiconductor laser and an optical system exhibiting chromatic aberration for directing the laser beam onto the tape. The optical system includes a condenser lens for focusing the beam onto the tape. Fine focus control is achieved by changing the wavelength of the laser beam by directing part of the beam reflected from the tape back to the laser, thereby changing the focal point of the beam by virtue of the chromatic aberration of the optical system. Coarse focus control is achieved by mounting the condenser lens on a piezoelectric actuator which moves the consenser lens to focus the beam onto the tape. A recording head for recording timing marks and tracking signals on the tape is disposed in advance of the optical head. A reading head reads the timing marks and the optical head reads the tracking signals. The timing marks and tracking signals are used to control the operation of the apparatus such that the tape is transported with a constant speed and data on diagonal signal tracks on the tape is accurately recorded, reproduced, or rewritten.

摘要翻译： 具有改进的聚焦和跟踪控制的光带装置。 光学头通过用激光束螺旋扫描磁带来记录，再现或重写光学带上的数据。 引导板设置在光头和带之间，以防止由于光头和带之间的空气膜带来的带的波动而导致光束不聚焦。 光头包含半导体激光器和具有用于将激光束引导到带上的色差的光学系统。 光学系统包括用于将光束聚焦到胶带上的聚光透镜。 通过将从带反射的光束的一部分引回到激光器来改变激光束的波长，从而通过光学系统的色差来改变光束的焦点来实现精细对焦控制。 通过将聚光透镜安装在压电致动器上来实现粗调焦控制，该压电致动器移动辅助透镜以将光束聚焦到带上。 在光学头之前设置用于在带上记录定时标记和跟踪信号的记录头。 读头读取定时标记，光头读取跟踪信号。 定时标记和跟踪信号用于控制装置的操作，使得磁带以恒定速度传送，并且磁带上对角线信号轨道上的数据被精确地记录，再现或重写。

公开(公告)号：US4733388A

公开(公告)日：1988-03-22

申请号：US894862

申请日：1986-08-08

申请人： Nobuyuki Fujimoto ,  Shinichi Abe ,  Yoshito Tsunoda ,  Kazuo Shigematsu ,  Yasunori Kanazawa ,  Toshinori Sugiyama ,  Tetsurou Ikegaki

发明人： Nobuyuki Fujimoto ,  Shinichi Abe ,  Yoshito Tsunoda ,  Kazuo Shigematsu ,  Yasunori Kanazawa ,  Toshinori Sugiyama ,  Tetsurou Ikegaki

IPC分类号： G11B17/028 ,  G11B19/20 ,  G11B23/00 ,  G11B25/04

CPC分类号： G11B17/0282 ,  G11B19/2009 ,  G11B23/0035

摘要： An information recording disc is provided with a magnetic attracting member in the form of metal piece or magnetic material which serves for attracting a disc member for recording, in particular, for optical recording and reproducing of information, to a spindle of a recording and reproducing apparatus. The magnetic attracting member is held in the space of a holder which is fixedly secured to the disc without the magnetic attracting member being fixedly secured to the disc. This arrangement enables a magnetic clamping of the disc member which provides for a decrease of retardation and is suitable for miniaturization of the apparatus.

摘要翻译： 信息记录盘设置有金属片或磁性材料形式的吸磁构件，其用于吸引用于记录的盘构件，特别是用于光学记录和再现信息的盘构件到记录和再现装置的主轴 。 磁吸引构件保持在固定地固定到盘的保持器的空间中，而磁吸引构件固定地固定在盘上。 这种布置使得能够减小延迟的盘构件的磁夹紧并且适合于装置的小型化。

公开(公告)号：US4622564A

公开(公告)日：1986-11-11

申请号：US681690

申请日：1984-12-14

申请人： Toshimitsu Kaku ,  Takeshi Nakao ,  Yoshito Tsunoda

发明人： Toshimitsu Kaku ,  Takeshi Nakao ,  Yoshito Tsunoda

IPC分类号： G11B7/0055 ,  G11B7/09 ,  G11B7/125 ,  G11B20/18 ,  G11B27/36 ,  G01D15/06 ,  G01D9/42

CPC分类号： G11B7/125 ,  G11B27/36 ,  G11B7/0055 ,  G11B7/0901 ,  G11B20/1879

摘要： In an optical information recording apparatus in which a plurality of light beams are focused on a disc to form a write/read spot or an erase spot, the position of the light spots on a track of the disc is detected to control the distance between the light spots or the length of the light spots, so that even when the positions at which the light spots are formed differ in the radial direction of the disc, uniform and accurate write/read/erase of information can be effected irrespective of the light spot positions.

摘要翻译： 在其中多个光束聚焦在盘上以形成写入/读取点或擦除点的光学信息记录装置中，检测光盘的轨道上的位置，以控制光盘之间的距离 光点或光斑的长度，使得即使形成光点的位置在盘的径向方向上不同，可以实现信息的均匀和准确的写入/读取/擦除，而不管光点如何 职位

公开(公告)号：US4298974A

公开(公告)日：1981-11-03

申请号：US37898

申请日：1979-05-10

申请人： Yoshito Tsunoda ,  Kimio Tatsuno ,  Toshimitsu Miyauchi ,  Kunio Aiki ,  Ryoichi Ito

发明人： Yoshito Tsunoda ,  Kimio Tatsuno ,  Toshimitsu Miyauchi ,  Kunio Aiki ,  Ryoichi Ito

IPC分类号： G02B7/28 ,  G11B7/08 ,  G11B7/09 ,  G11B7/12 ,  G11B7/127 ,  G11B7/135 ,  G11B7/14

CPC分类号： G11B7/14 ,  G11B7/127

摘要： An optical head comprising a semiconductor laser array which is used as a light source, and an optical system which guides laser beams from the array to a predetermined recording medium. The beam from one lasing point of the array is modulated by predetermined information and is used as a recording beam, while the beam from another lasing point is continuously oscillated and is used as a playback beam.

摘要翻译： 包括用作光源的半导体激光器阵列的光学头以及将激光束从阵列引导到预定记录介质的光学系统。 来自阵列的一个激光点的光束由预定信息调制，并用作记录光束，而来自另一个激光点的光束被连续地振荡并用作回放光束。

公开(公告)号：US4051528A

公开(公告)日：1977-09-27

申请号：US661806

申请日：1976-02-26

申请人： Yasutsugu Takeda ,  Hisashi Nakamura ,  Yoshito Tsunoda ,  Toshihisa Tsukada ,  Toshimitsu Miyauchi

发明人： Yasutsugu Takeda ,  Hisashi Nakamura ,  Yoshito Tsunoda ,  Toshihisa Tsukada ,  Toshimitsu Miyauchi

IPC分类号： H04N5/85 ,  G02B27/00 ,  G11B7/09 ,  G11B7/095 ,  G11B7/12 ,  G11B7/125 ,  G11B7/128 ,  G11B7/135 ,  H04N5/86

CPC分类号： G11B7/128 ,  G11B7/095 ,  G11B7/12 ,  Y10S250/909

摘要： Optical information reconstructing apparatus comprising a disc having at least one surface on which groups of dots bearing information are concentrically or spirally arrayed, a mechanism for rotating the disc, a light source for projecting a light beam on the array of groups of dots, and at least one photodetector for detecting diffracted light waves from the groups of dots, characterized in that a semiconductor laser array is used as the light source and that the light emission is switched from one laser source to another in the laser array in tracking the information.

公开(公告)号：US4037919A

公开(公告)日：1977-07-26

申请号：US576460

申请日：1975-05-12

申请人： Yasutsugu Takeda ,  Yoshito Tsunoda

发明人： Yasutsugu Takeda ,  Yoshito Tsunoda

IPC分类号： G03H1/00 ,  G03H1/16 ,  G03H1/30

CPC分类号： G03H1/00

摘要： A holographic device comprises a film for displaying a three-dimensional object as images, each of which is obtained as viewed in a respective one of a plurality of different directions, a phase plate for providing a light beam for illuminating each of said images of the film with an additional phase at random, a sampling grating for dividing a light beam from the phase plate into a plurality of small groups of light beams, a photosensitive material, and a slit for simultaneously radiating said light beam and a light beam having coherency therewith on each position of said photosensitive material in succession.

公开(公告)号：US4953152A

公开(公告)日：1990-08-28

申请号：US138582

申请日：1987-12-29

申请人： Masaru Ito ,  Hitoshi Watanabe ,  Toshiaki Taii ,  Yoshito Tsunoda

发明人： Masaru Ito ,  Hitoshi Watanabe ,  Toshiaki Taii ,  Yoshito Tsunoda

IPC分类号： G11B7/135 ,  G11B7/09 ,  G11B7/26

CPC分类号： G11B7/26

摘要： A mastering machine for an optical disk provided with a closed loop for controlling the incident angle of at least one of the guide groove forming beam and header forming beam which enter a condenser lens, and thereby controlling to a predetermined level the distance between a guide groove forming light spot and a header forming light spot on a photosensitive layer.

摘要翻译： 一种用于光盘的母盘制造机，其具有用于控制进入聚光透镜的导向槽形成光束和光束头形成光束中的至少一个的入射角的闭环，从而将预定水平控制在导向槽 在感光层上形成光点和形成光斑的头部。

公开(公告)号：US4759628A

公开(公告)日：1988-07-26

申请号：US826341

申请日：1986-02-05

申请人： Kimio Tatsuno ,  Yoshito Tsunoda ,  Masatoshi Ohtake ,  Keiji Kataoka ,  Seiji Yonezawa

发明人： Kimio Tatsuno ,  Yoshito Tsunoda ,  Masatoshi Ohtake ,  Keiji Kataoka ,  Seiji Yonezawa

IPC分类号： G01J9/02 ,  G01B9/02 ,  G01J3/45 ,  G01J9/04

CPC分类号： G01J9/04 ,  G01J3/45

摘要： In an interferometry wherein a light beam from a light source is divided in two, one of which is used as a reference beam and the other beam is used as an inspecting beam, and the two beams are projected again on an identical plane so as to form an interference pattern; a wavelength scanning type laser diode interferometry characterized in that a laser diode is employed as the light source, and that an injection current of the laser diode is modulated thereby to scan a wavelength of the laser diode and to change an intensity distribution of the interference pattern.

摘要翻译： 在其中来自光源的光束被分成两部分的干涉测量中，其中一个用作参考光束，另一个光束用作检查光束，并且两个光束再次投射在相同的平面上，以便 形成干扰模式; 波长扫描型激光二极管干涉测量法，其特征在于使用激光二极管作为光源，并且调制激光二极管的注入电流，从而扫描激光二极管的波长并改变干涉图案的强度分布 。

公开(公告)号：US4283785A

公开(公告)日：1981-08-11

申请号：US33806

申请日：1979-04-26

申请人： Toshimitsu Miyauchi ,  Yoshito Tsunoda

发明人： Toshimitsu Miyauchi ,  Yoshito Tsunoda

IPC分类号： H04N5/85 ,  G11B7/0045 ,  G11B7/12 ,  G11B7/125 ,  G11B7/126 ,  G11B20/06 ,  G11B20/18 ,  G11B27/36 ,  H01S5/0683 ,  G11B7/00

CPC分类号： G11B7/126 ,  G11B20/06 ,  G11B20/18 ,  G11B27/36 ,  G11B7/0045 ,  G11B7/12 ,  H01S5/06835

摘要： In an optical information recording apparatus, a version of a recording light emitted from a light source and reflected by a recording medium is detected to control the recording light output power of the light source.

摘要翻译： 在光学信息记录装置中，检测从光源发射并由记录介质反射的记录光的版本，以控制光源的记录光输出功率。